Lyrics app using Spotify integration

[Chidico]

I'm developing a language-learning app that utilizes Spotify songs. Users would log in via Spotify, select a target language, and the app would generate AI-powered lessons based on song lyrics and their translations.
Key Questions:
Is it possible to access full song lyrics and translations via Spotify's API or other integrations?
I've noticed Spotify integrations often limit audio clips to 30 seconds. Can these clips be strategically selected from different parts of a song (e.g., verse, chorus) instead of a single continuous segment?

Are there any limitations regarding the amount of song data (lyrics, audio) that can be accessed for this type of application, considering both free and premium Spotify accounts and regional restrictions?

Are there any known legal issues with using lyrics in this way?

I'm aware of apps like Swipeify using 30-second clips, but I need more comprehensive song data for my app's functionality.